Hi john,
Beneath your boiler there should be a filling loop to top up the pressure inside your system. Your boiler may however have an internal one, if you know the model or GC number of your ferroli then please post it and i can take a look. Anyway when you have found the filling loop which will look like [img]http://www.bhl.co.uk/images/products/55343/detail/rwc-15mm-combiboiler-filling-loop.jpg[/img] then you need to turn both ends a quarter turn and watch the gauge on the boiler till it gets to 1-1.5 and turn them both back off.
Martin, February 2012
